LCD screen refreshes not from top to bottom?

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LCD screen refreshes not from top to bottom?

Postby Q83Ia7ta » 03 Mar 2016, 15:44

While testing 1200fps camera I've noticed strange refreshing from bottom to top at lowest case (7,5ms).
Monitor is Asus PG278Q. Refresh rate is 144Hz. 1200fps capture. Logitech G100S (500Hz). ezQuake with stable 1200fps.
LED connected to right mouse button and that button binded to changed crosshair color to green. Left mouse button changes crosshair color to black.
https://www.youtube.com/watch?v=1EKZUUj0Qa4 playback is 7.5 fps
I saw such from bottom to top update only at ~1-5% of measurements.
Captured height of screen is about 20%.
Is it ok?
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Re: LCD screen refreshes not from top to bottom?

Postby sharknice » 04 Mar 2016, 18:52

Probably because you don't have VSYNC on.
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Re: LCD screen refreshes not from top to bottom?

Postby lexlazootin » 06 Mar 2016, 09:57

screen tear, unless you v-sync it you will always get them.
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